diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index 437faa2eb65a983eef21eaf0e90eafe81c147ad8..1b109cdfa030394d732234950248ad43172905cf 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -1823,7 +1823,7 @@ test containsAtLeastScalar2 {
 }
 
 /// Reads an integer from memory with size equal to bytes.len.
-/// T specifies the return type, which must be large enough to store
+/// ReturnType specifies the return type, which must be large enough to store
 /// the result.
 pub fn readVarInt(comptime ReturnType: type, bytes: []const u8, endian: Endian) ReturnType {
     assert(@typeInfo(ReturnType).int.bits >= bytes.len * 8);